Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
  • G03C8/02—Photosensitive materials characterised by the image-forming section
  • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
  • G03C8/06—Silver salt diffusion transfer
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/29—Development processes or agents therefor
  • G03C5/30—Developers

Definitions

• ABSTRACT In a process for forming photographic images by a high speed diffusion transfer process, the improvement which comprises using a small amount of a highly active developing agent and a large amount of at least one phenol is disclosed.
• the present invention relates to a process for forming photographic images by a high speed diffusion transfer process, and more particularly to a process for treating an exposed silver halide photographic material by a high speed diffusion transfer process.
• a latent image contained in a selectively exposed light-sensitive silver halide emulsion is developed. Almost concurrently therewith, a soluble silver complex is obtained by reaction of a silver halide solvent with the unexposed and undeveloped silver halide of said emulsion.
• the light-sensitive silver halide emulsion is developed with a processing composition in a viscous condition, which is spread between the light-sensitive element comprising the silver halide emulsion and an image-receiving element comprising a suitable silver precipitating layer.
• the processing composition effects development of the latent image in the emulsion and substantially contemporaneous therewith forms a soluble complex, for example, a thiosulfate or thiocyanate complex, with the undeveloped silver halide.
• a soluble complex for example, a thiosulfate or thiocyanate complex
• This soluble silver complex is, at least in part, transported in the direction of the imagereceiving element and the silver thereof is largely precipitated in the silver precipitating layer of said element to form the desired positive images therein.
• High speed diffusion transfer processes are generally of the type in which, for example, a silver halide emulsion layer containing a latent image formed by exposure and an image-receiving layer, in superposition, are subjected to a processing composition containing a highly energetic silver halide developing agent and a silver halide solvent in order to form a silver transfer image in and/or on the image-receiving layer.
• the silver halide solvent reacts with unreduced silver halide to form the soluble silver complex which, in turn, is reduced in the presence of the image-receiving layer to form the desired positive images.
• the lightsensitive layer may be subsequently dissociated or stripped from the image-receiving layer.
• An object of the present invention is to provide novel high speed diffusion transfer processes wherein a silver halide emulsion has been subjected to the minimum exposure, for example, A.S.A. Exposure Index of 1,000
• Another object of the present invention is to provide novel high speed diffusion transfer processes wherein the stripping properties of the developing solutions from the image-receiving layer having positive images are improved and good positive images are obtained in 1 minute or less.
• a further object of the present invention is to provide a novel developing solution for high speed diffusion transfer processes.
• one type is a treating solution containing a kind of developing agent having high activities (hereinafter, referred to as a highly active developing agent), by which a latent image contained in a light-sensitive silver halide emulsion exposed .to the minimum exposure is developed and a positive image is simultaneously formed on a image receiving layer
• the other is a developing solution containing a highly active developing agent capable of developing an exposed silver halide emulsion strongly and a low active developing agent capable of reducing a soluble silver complex and forming a positive image on an image-receiving layer.
• the process of the present invention belongs to the latter type but the process of the present invention is characterized by using phenols as the low active developing agent in combination with the highly active developing agent.
• the phenols used as a low active developing agent may contain phenol and phenol derivative.
• the phenol derivatives there are phenols substituted with an alkyl group having 1 to 4 carbon atoms, and alkenyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an aryl group, a halogen atom, a nitro group, a cyano group, a nitroso group, a carboxy] group,a carboalkoxy group, of which the alkoxy group has 1 to 4 carbon atoms, a sulfo group, an acyl group, an acyloxy group and/or other groups. These substituents may be substituted with each other.
• the phenol derivative has 1 to 3 substituents, which may be connected to the 0-, m-, or p-position of the phenol.
• phenol cresol including 0-, mand p-isomers
• 2-allylphenol Z-methoxyphenol 0,0'-dihydroxybiphenyl 2-chlorophenol
• 2-hydroxylmethylphenol 4-B-aminomethylphenol 4-nitrophenol 3-cyanophenol
• the highly active developing. agents used together with the phenols are aminophenols such as paminophenol or N-methyl-p-aminophenol sulfate.
• the highly active developing agent In the process of the present invention, it is preferable that a small amount of the highly active developing agent and a large amount of the low active developing agent be used.
• the amount of the latter must be substantially more than that of the former. More particularly, the amount of the highly active developing agent is not more than 0.2 mol/liter and that of the low active developing agent is not less than 0.1 mol/liter, preferably not less than 0.3 mol/liter.
• the developing solution of the present invention may contain a silver halide solvent such as thiosulfate or thiocyanate, an alkali agent such as sodium hydroxide and a viscosity-imparting agent such as carboxymethyl cellulose or hydroxyethyl cellulose.
• a silver halide solvent such as thiosulfate or thiocyanate
• an alkali agent such as sodium hydroxide
• a viscosity-imparting agent such as carboxymethyl cellulose or hydroxyethyl cellulose.
• the concentration of the alkali agent, or the pH of the developing solution may be a conventional value, for example, 2 to 5 percent alkali.
• the viscosity of the developing solution may be 1,000 to 200,000, preferably 5,000 to 50,000.
• Example 1 Between the silver halide emulsion layer exposed in the region of such low illuminance as more than ASA 1,000, and an image-receiving layer comprising a silver-precipitant layer containing nuclei of physical development, a developing solution of the following composition was uniformly spread in a thickness of about 30 microns to effect the diffusion transfer processing.
• the imagereceiving layer was stripped, and there was obtained a glossy positive image with satisfactory gradation and without any developing solution remained.
• Example 3 Repeating the same processing as in Example 1 but using 0.5 mol/liter of 2, 6-dimethylphenol instead of pcresol, there was obtained a glossy positive image of satisfactory gradation.
• Example 4 Repeating the same processing as in Example 1 but using 2-chlorophenol in an amount of 0.5 mol per liter instead of p-cresol, a glossy positive image having a satisfactory gradation was obtained.
• Example 5 Repeating the same processing as in Example 1 except that p-cresol was replaced by 0.5 mol per liter of 4-nitrophenol, there was obtained a glossy positive image of satisfactory gradation.
• Example 6 Repeating the same processing as in Example 1 but using 4-acetlyphenol instead of p-cresol, there was obtained a glossy positive image of satisfactory gradation.
• phenol is phenol or phenol substituted with l to 3 substituents selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an aryl group, a halogen atom, a nitro group, a cyano group, a nitroso group, a carboxyl group, a carboalkoxy group, of which the alkoxy group group, an acyl group 2-allylphenol, 2-methoxyphenol, 0, 0 dihydroxybiphenyl, 2-chlorophenol, 2- hydroxymethylphenol, 4-B-aminoethylphenol, 4-
• said developing solution contains a silver halide solvent, an alkali and a viscosity-imparting agent.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)

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Publications (1)

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Family Applications (1)

Country Status (4)

Citations (6)

• 1970
  • 1970-04-20 JP JP45033135A patent/JPS496211B1/ja active Pending
• 1971
  • 1971-04-20 GB GB1016571*[A patent/GB1342173A/en not_active Expired
  • 1971-04-20 DE DE19712119190 patent/DE2119190A1/de active Pending
  • 1971-04-20 US US00135766A patent/US3849133A/en not_active Expired - Lifetime

Patent Citations (6)

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